Robert Boschgmbh

Richard Braak

Ulrich May

Michael Fraune

Marcus Guenther

Gerald Schuetze

The invention relates to an antiwear-coated metal component (), in particular for a ball valve (), the tribosurface of which component is at least partially provided with a multi-layer antiwear coating (). The antiwear coating () has at least a metal adhesion layer (), an adhesion-promoting layer () and at least one first cover layer (). The adhesion-promoting layer () comprises a carbide-forming metal or a boride-forming metal. The at least first cover layer () comprises a hydrogen-free tetrahedral carbon. The invention further relates to a method for applying an antiwear coating () to a metal substrate () in order to produce an antiwear-coated metal component () of this type. The invention further relates to a ball valve, comprising an antiwear-coated metal component () of this type and an antiwear coating ().

Antiwear-coated metal component, in particular for a ball valve, and method for applying a multi-layer antiwear coating in order to produce a component of this type

The invention relates to a method for carrying out a test and measuring method on a flat test specimen (), wherein a mechanical load is introduced into a test specimen surface () by means of a rotating engraving head () of an engraving device (), wherein the engraving head () penetrates with a defined contact pressure at least into a layer system () applied to the test specimen (), wherein the rotating engraving head () is moved along the test specimen surface () and relative to the test specimen () in order to create at least one engraving () on the test specimen surface () by plastic deformations and/or brittle chipping of the layer system (), and wherein the at least one engraving () introduced into the test specimen surface () is measured using a photo-optical method in order to evaluate layer adhesion of the layer system () to the main body (). The invention also relates to an engraving device () for carrying out such a method.

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Stuttgart, Germany

Richard Braak